I have a 95 e320 wagon and my blower motor also stopped. I haven't done all the things you tried - but did check the 30 amp link fuse and measured the voltages at the connector. I am also getting no voltage on the red wire and no signal voltage on the yellow wire. Keep me posted on what you find - I think our problem is no 12 vdc on red wire (?) - but I don't know what is causing it